<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <div style="margin-top: 15px;">
                <el-row>
                    <el-col>
                        <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
                    </el-col>
                </el-row>
            </div>

            <!-- 角色列表区域 -->
            <div>
                <el-table :data="roleslist" border stripe>
                    <el-table-column type="expand">
                        <template slot-scope="scope">
                            <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                                <!-- 渲染一级权限 -->
                                <el-col :span="5">
                                    <el-tag closable @close="removeRightById(scope.row,item1.id)">
                                        {{item1.authName}}
                                    </el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <!-- 渲染二级和三级权限 -->
                                <el-col :span="19">
                                    <!-- 通过for循环嵌套渲染二级权限 -->
                                    <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children"
                                    :key="item2.id">
                                        <el-col :span="6">
                                            <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">
                                                {{item2.authName}}
                                            </el-tag>
                                            <i class="el-icon-caret-right"></i>
                                        </el-col>
                                        <el-col :span="18">
                                            <el-tag type="warning" :class="[i3 === 0 ? '' : 'bdtop']" v-for="(item3,i3) in item2.children"
                                            :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                                {{item3.authName}}
                                            </el-tag>
                                        </el-col>
                                    </el-row>
                                </el-col>
                            </el-row>
                        </template>
                    </el-table-column>
                    <!-- 索引列 -->
                    <el-table-column type="index" label="#">
                    </el-table-column>
                    <el-table-column prop="roleName" label="角色名称">
                    </el-table-column>
                    <el-table-column prop="roleDesc" label="角色描述">
                    </el-table-column>
                    <el-table-column label="操作" width="300px">
                        <template slot-scope="scope">
                            <!-- 修改按钮 -->
                            <el-button type="primary" icon="el-icon-edit" size="mini"
                            @click="showEditDialog(scope.row.id)">编辑</el-button>
                            <!-- 删除按钮 -->
                            <el-button type="danger" icon="el-icon-delete" size="mini"
                            @click="removeRoleById(scope.row.id)">删除</el-button>
                            <!-- 分配权限按钮 -->
                            <el-tooltip effect="dark" content="分配权限" placement="top" :enterable="false">
                                <el-button type="warning" icon="el-icon-setting" size="mini"
                                @click="showSetRightDialog(scope.row)">分配权限</el-button>
                            </el-tooltip>
                        </template>
                    </el-table-column>
                </el-table>
            </div>
        </el-card>

        <!-- 添加角色对话框 -->
        <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
          <!-- 内容主体区域 -->
          <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
            <el-form-item label="角色名称" prop="roleName" label-width="100px">
              <el-input v-model="addForm.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc" label-width="100px">
              <el-input v-model="addForm.roleDesc"></el-input>
            </el-form-item>
          </el-form>
          <!-- 底部按钮区域 -->
          <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addRole">确 定</el-button>
          </span>
        </el-dialog>

        <!-- 编辑角色对话框 -->
        <el-dialog title="编辑角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
          <!-- 内容主体区域 -->
          <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
            <el-form-item label="角色名称">
              <el-input v-model="editForm.roleName" disabled></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc" label-width="100px">
              <el-input v-model="editForm.roleDesc"></el-input>
            </el-form-item>
          </el-form>
          <!-- 底部按钮区域 -->
          <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRoleInfo">确 定</el-button>
          </span>
        </el-dialog>

        <!-- 分配权限对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
          <!-- 树形空间 -->
          <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all
          :default-checked-keys="defkeys" ref="treeRef"></el-tree>
          <!-- 底部按钮区域 -->
          <span slot="footer" class="dialog-footer">
          <el-button @click="setRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
          </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    return {
      roleslist: [],
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的结点Id值数组
      defkeys: [],
      // 当前即将分配权限的角色id
      roleId: '',
      // 添加角色的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 修改角色的表单数据
      editForm: {},
      // 分配角色权限的表单数据
      setForm: {},
      // 控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      // 控制编辑角色对话框的显示与隐藏
      editDialogVisible: false,
      // 控制分配角色权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 添加角色表单的验证对象
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      // 修改角色表单的验证对象
      editFormRules: {
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      }
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      //   console.log(res)
      if (res.meta.status !== 200) { return this.$message.error('获取角色列表失败！') }
      this.roleslist = res.data
    },
    // 点击按钮添加角色
    addRole () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {}
        // 可以发起添加角色的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        console.log(res)
        if (res.meta.status !== 201) { return this.$message.error('添加角色失败') }
        this.$message.success('添加角色成功')
        // 隐藏添加的对话框
        this.addDialogVisible = false
        // 重新获取角色列表的数据
        this.getRolesList()
      })
    },
    // 关闭添加角色对话框
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 修改角色信息
    editRoleInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) {}
        // 可以发起修改角色的网络请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        // console.log(res)
        if (res.meta.status !== 200) { return this.$message.error('修改角色信息失败') }
        this.$message.success('修改角色信息成功')
        // 隐藏修改角色的对话框
        this.editDialogVisible = false
        // 重新获取角色列表的数据
        this.getRolesList()
      })
    },
    // 打开修改角色信息对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败')
      }
      this.editForm = res.data
      console.log(this.editForm)
      this.editDialogVisible = true
    },
    // 关闭修改角色对话框
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 根据ID删除对应的角色信息
    async removeRoleById (id) {
      // 删除前弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 确认删除返回字符串confirm，取消返回cancel
      if (confirmResult !== 'confirm') { return this.$message.info('删除操作已取消') }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) { return this.$message.error('删除失败') }
      this.$message.success('删除成功')
      // 删除成功后重新刷新角色列表的数据
      this.getRolesList()
    },
    // 根据ID删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      //   console.log(confirmResult)
      if (confirmResult !== 'confirm') { return this.$message.info('取消了删除！') }
      //   console.log('确认了删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) { return this.$message.error('删除权限失败！') }
      // 不建议，会发生页面的完整渲染
      //   this.getRolesList()
      role.children = res.data
    },
    // 打开分配权限对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的对话框
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) { return this.$message.error('获取用户权限数据失败') }
      // 获取到的权限数据保存到data中
      this.rightslist = res.data
      //   console.log(this.rightslist)
      // 递归获取三级结点的Id
      this.getLeafKeys(role, this.defkeys)
      this.setRightDialogVisible = true
    },
    // 监听分配角色权限对话框的关闭时间
    setRightDialogClosed () {
      this.defkeys = []
    },
    // 通过递归的形式获取角色下所有三级的id，并保存到defkeys数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        // 如果node结点不包含children属性，则是三级结点
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getLeafKeys(item, arr)
      )
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      //   console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) { return this.$message.error('分配权限失败！') }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style Lang="less" scoped>
.el-tag {
    margin: 7px;
}

.bdtop{
    border-top: 1px solid;
}

.bdbottom{
    border-bottom: 1px solid;
}

.vcenter {
    display: flex;
    align-items: center;
}
</style>
